package com.exmp;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class ex5 {

    public class MyService {
        private Lock lock = new ReentrantLock();

        //Lock lock=new ReentrantLock(true);//公平锁

        //Lock lock=new ReentrantLock(false);//非公平锁

        private Condition condition=lock.newCondition();//创建 Condition

        public void testMethod() {
            try {
                lock.lock();//lock 加锁
                //1：wait 方法等待：
                //System.out.println("开始 wait");
                condition.await();
                //通过创建 Condition 对象来使线程 wait，必须先执行 lock.lock 方法获得锁
                 //:2：signal 方法唤醒
                condition.signal();//condition 对象的 signal 方法可以唤醒 wait 线程
                for (int i = 0; i < 5; i++) {
                    System.out.println("ThreadName=" + Thread.currentThread().getName()+ (" " + (i + 1)));
                }
            }catch (InterruptedException e) {
                e.printStackTrace();
            }
            finally
            {
                lock.unlock();
            }
        }

    }
}
